Ruthless Audio 15" 3" Coil Subwoofer Quad Stack Motor

Ruthless Audio 15" 3" Coil Subwoofer Quad Stack Motor

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The Ruthless Audio 15" 3" Coil Subwoofer Quad Stack Motor is a 15-inch Ruthless Audio Quad Stack subwoofer rated for 2,500 watts RMS. It is available with dual 0.7-ohm or dual 1.7-ohm voice coils, giving builders options when planning the final load for a compatible monoblock amplifier.

The product uses a 3-inch, 4-layer voice coil, quad-stack motor, five progressive spiders, and the lead construction listed below. Confirm the exact enclosure and amplifier match before ordering.

Ruthless Audio 15" 3" Coil Subwoofer Quad Stack Motor Specifications

• Product series: Ruthless Audio Quad Stack subwoofer
• Size: 15 inches
• RMS power handling: 2,500 watts
• Voice-coil options: Dual 0.7 ohm or dual 1.7 ohm
• Voice coil: 3-inch, 4-layer voice coil
• Motor: Quad-stack motor using U.S. steel, CNC machining, and an FEA-optimized design
• Suspension: Five progressive spiders
• Lead system: 144-count leads
• Application: High-output daily and competition-style bass systems

Choose the Voice-Coil Option Before Ordering

Both available versions are dual-voice-coil subwoofers. Select dual 0.7 ohm or dual 1.7 ohm based on the number of subwoofers, the wiring configuration, the target final load, and the amplifier's stable and warrantied impedance.

Enclosure and Electrical Planning

Do not choose an enclosure only by diameter. The box must match the subwoofer's required airspace, mounting depth, displacement, and the intended sealed or ported design. The amplifier powering a subwoofer at this level may also require upgraded power wire, fusing, grounds, battery reserve, Big 3 wiring, and alternator support.

Match the Ruthless Subwoofer to the Complete Bass System

This 15-inch subwoofer must be matched to the amplifier's RMS output at the final wired impedance, the correct enclosure, adequate speaker wire, and enough electrical support for the amplifier. Confirm the selected dual-voice-coil option before ordering because the coil impedance changes the final load.

Shop Ruthless Audio Subwoofers and Enclosures

Browse the full Ruthless Audio collection, compare more car audio subwoofers, shop 15-inch subwoofers, or find a suitable option in the subwoofer boxes and enclosures collection.

Helpful Subwoofer and Enclosure Guides

Learn how the specifications work in the subwoofer specifications guide, calculate the final impedance with the subwoofer wiring and ohm-load guide, and choose an enclosure with the car audio subwoofer box guide.

The complete car audio bass setup guide covers the subwoofer, amplifier, box, wiring, and electrical system. For high-output enclosures, the box-rise guide explains why the real operating load may differ from the nominal wired load.

Frequently Asked Questions

Is this listing for the 15-inch version?

Yes. The product title and description identify this listing as the 15-inch version.

Which voice-coil option should I order?

Choose the option that creates a safe final impedance for the amplifier and the number of subwoofers in the system. Calculate the full wiring plan before ordering.

Can I use any 15-inch box?

No. Match the enclosure to the exact subwoofer requirements and measure the available vehicle space before ordering or building a box.

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